Mechanism for bag filling and weighing machines



. 4, 1934. w. D. WRIGHT MECHANISM FOR BAG FILLING AND WEIGHING MACHINES Original Filed Jan. 27, 1933 2 Sheets-Sheet 1 1934- w. D. WRIGHT 1,983,427

MECHANISM FOR BAG FILLING AND WEIGHING MACHINES Original Filed Jan. 27, 1935 2 Sheets-Sheet 2 swam 049 William D Ma gy/r2,

Patented Dec. 4, 1934 MECHANISM FOR BAG FILLING AND WEIGHING MACHINES William D. Wright, Brockport, N. Y., assignor to Charles F. Robb, Jr., Webster, N. Y.

Original application January 27, 1932, Serial No.

589,283. Divided and this application November 24, 1933, Serial No. 699,593

10 Claims.

The invention relates to feeding mechanism for bag filling and Weighing machines and is a division of application Serial No. 589,283, filed by me on or about January 27, 1932, for a bag filling and weighing machine. I

The object of the present invention is to improve the construction of feeding mechanism for bag filling and weighing machines and to provide a simple, practicaland efiicient bag feeding mechanism capable of producing a continuous uriinterrupted and unobstructed flow of material from a hopper to the bag being filled and of maintaining such continuous flow of the material during the bag filling operations without liability of the material backing in the feeding mechanism and clogging the same.

With these and other objects in view, the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and set forth in the claims hereto appended, it being understood that various changes in the form, proportion, and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit of the invention or sacrificing any of the advantages thereof.

In the drawings: v

Figure 1 is a side elevation of abag filling and weighing machine provided with feeding mechanism constructed in accordance with this invention.

Fig. 2 is a vertical section through the upper portion of the bag filling and weighing machine.

Fig. 3 is a detail elevation of the vertical shaft of the upper impeller and the agitator of the hopper.

Fig. 4 is a. horizontal sectional view on the line 4-4 of Fig. 1.

Fig. 5 is a horizontal sectional view on the line 55 of Fig. 2.

In the accompanying drawings in which is illustrated the preferred embodiment of the invention, 1 designates the main frame of the bag filling and weighing machine and the said frame 1 is shown in the form of a substantially rectangular casing. Mounted upon the top of the frame or casing 1 are upper and lower impeller casings 5 and 6 and a hopper '7 through which extends a vertical shaft 8 carrying at its upper portion agitator arms 9 and 10 located within the hopper and adapted to agitate the material therein to prevent caking, bridging or arching of the material and to facilitate the feeding of the same through an outlet opening 11 in the top wall of the upper impeller casing 5.

The hopper 'l, which is mounted upon the upper impeller casing, is preferably of. inverted truncoconical formation and is arranged within a support consisting of a vertical standard 12 and curved arms 13 extending from the upper end of the standard in opposite directions and arranged at an inclination and embracing the hopper at one side thereof and partially encircling the same, as clearly illustrated in Fig. 1 of the drawings. The lower portion of the standard 12 is suitably secured to the main frame of the machine and is arranged exteriorly of the casing of the same. The hopper is preferably flanged at the bottom at 14 and is retained on the upper impeller casing by suitable clamps 15, but any other suitable means may, of course, be employed for mounting the hopper in position above the upper impeller casing for supplying material to the same.

The agitator arms 9 and 10 are located above the bottom of the hopper, and the shaft 8 also carries horizontal rotating arms 16 located at the upper face of the top wall of the upper impeller casing and operating as a scraper to assist in causing the material to pass through the inlet opening 11 of the upper impeller casing.

The upper impeller casing, which is cylindrical, is provided in its bottom with an outlet opening 17 communicating with the lower impeller casing and located diametrically opposite the inlet opening 11.

The body portion of the upper impeller casing is cylindrical and is adjustable to change the position of the outlet 17 with respect to the upper inlet opening 18 of the lower impeller casing. The bottom of the upper impeller casing constitutes a rotary disk for varying the size of the passage from the upper impeller casing to the lower impeller casing. This will vary the size of the passage between the upper and lower impeller casings. The cylindrical body portion of the upper impeller casing is arranged in a seat 19 in the top wall of the lower impeller casing and is adapted to be partially rotated by an operating arm 20, provided at its inner end with an attaching portion 21 secured to the cylindrical body portion of the upper impeller casing exteriorly thereof.

The operating arm 20 is provided with a depending flange or portion 22 having a thumb screw 23 or other adjustable means for engaging an arcuate series of sockets 24 provided in a vertical wall of the lower impeller casing for enabling the body portion of the upper impeller casing to be secured in its rotary adjustment. By adjusting the operating arm 20 the size of the passage between the upper and lower impeller casings may be varied to suit the character of the material operated on by the bag filling machine. The upper rotary impeller consists of a hub and approximately tangentially disposed blades 25 which are set at an angle or inclination, as clearly illustrated inFig. 3 of the drawings, to enable them to sweep the material through the passage between the upper and lower impeller casings and to exert a downward; pressure on the material. V

The cylindrical wall of the upper impeller casing is interiorly inclined at 26 and extends upwardly and inwardly from the outer wall of the opening in the bottom of the upper impeller casing, as clearly shown in Fig. 2 of the, drawings, to assist in feeding the material downwardly from the upper impeller casing. The inclined surface or portion 26 of the'cylindricalwall of the upper impeller casing overhangs the opening in the bottom of the said upper impeller casing and thereby prevents material from accumulating on it and at the same time tends to crowd the material through the opening. The upper rotary impeller is clamped to the vertical shaft 8 by a screw 27 or other suitable fastening means, and

the shaft 8 forms the pivot on which the cylindrical body portion of theupper impeller casing turns in its rotary adjustment.

The lower impeller casing, which is cylindrical, is provided at the front with a discharge outlet 28, and the lower rotary impeller 29 consists of a central hub portion and approximately tangentially arranged blades 30 which extend above the plane of the upper face of the hub and have their inner ends beveled or cut away at 31 adjacent the said upper face of the hub, as clearly illustrated in Fig. 2 of the drawings. The blades 30 of thelower rotary impeller discharge or feed the material through the discharge opening 28. The said blades 30 are connected at the bottom by an integral disk 32 constituting a bottom for the lower rotary impeller and cooperating with the blades 30 to form pockets open at the top and closed at the bottom for carrying the material to the discharge outlet. The said pockets of the lower rotary impeller are closed at the periphery of the impeller by the cylindrical wall of the impeller casing 6. i

The bottom of the lower impeller casing is provided with opposite openings 33, which are located above registering openings 34 of an airtight dust box 35 within the main frame of the machine and arranged immediately below the lower impeller casing, as clearly shown in Fig. 2 of the drawings. The dust box forms an airtight dust chamber for collecting dust accumulating below the lower rotary impeller, and assists in maintaining the lower impeller casing free from such dust. The dust box is provided at the back of the machine with a removable plate 36 constituting the rear wall of the dust box and secured to each of the side walls by-a screw 37 or other suitable fastening means for enabling the rear wall or plate to be readily removed for cleaning the dust box.

Within the dust chamber is arranged a central cylindrical bearing member 38 provided with a central opening and having upper and lower roller bearings 39 and 40, within which is arranged a tubular shaft 42 to which the lower rotary impeller is secured. The upper terminal portion 43 of the tubular shaft is reduced and threaded to receive a nut 44, which clamps the lower rotary impeller on the tubular shaft and against the shoulder formed by the reduction of the upper portion of the said tubular shaft. While roller bearings 39 and are provided for the upper and lower portions of the tubular shaft 42, any other suitable bearings may, of course, be provided for mounting the tubular shaft through which passes the vertical shaft 8.

The upper and lower impeller casings which house the upper and lower impellers form upper and lower cylindrical impeller chambers and the bottom .of the upper impeller casing constitutes arotary disk for varying the size of the passage between the upper and lower impeller chambers. While the housing for the upper and lower impellers are shown separate any other suitable housing having the upper and lower impeller chambers and the rotary disk member for varying the size of the passage between the upper.

inlet opening and the lower impeller casing being provided with an inlet opening at the top at the outlet opening of the upper impeller casing to form a passage from the upper impeller casing to the lower impellercasing, said upper impeller casing having a rotary adjustment to arrange its outlet opening in different positions with relation to the inlet opening of the lower impeller casing for varying the size of the said passage, and upper and lower rotary impellers operating in the said casings. v

2. A bag filling machine of the class described, including a hopper, upper and lower impeller casings located below the hopper, the upper impeller casing being provided at the top at one side with an inlet opening and having at the bottom an outlet opening out of alignment with the inlet opening and the lower impeller casing being provided with an inlet opening at the top at the outlet opening of the upper impeller casing to' form a passage from the upper impeller casing to the lower impeller casing, said upper impeller casing having a rotary adjustment to arrange its outlet opening in different positions with relation to the inlet opening of the lower impeller casing for varying the size of the said passage, an operating arm connected with the upper impeller casing for adjusting the same, means carried'by the said arm for engaging the lower impeller casing to secure the upper impeller casing in its adjustment, and upper and lower impellers operating in the said casings.

3. A bag filling machine of the class described, including a hopper, upper and lower impeller casings located below the hopper, the upper impeller casing being provided at the top at one side with an inlet opening and having at the bottom an outlet opening out of alignment with the inlet opening and the lower impeller casing being provided with an inlet opening at the top at the outlet opening of the upper impeller casing to form a passage from the upper impeller casing to the lower impeller casing, "said upper impeller casing having a rotary adjustment to arrange its outlet opening in different positions with relation to the inlet opening of the lower impeller casing iio for varying the size of the said passage, the lower impeller casing being provided with an arcuate series of sockets, an operating arm rigid with and extending from the upper impeller casing and provided with a depending portion, a clamping screw carried by the depending portion of the operating arm and arranged to engage the said sockets for securing the upper impeller casing in its adjustment, and upper and lower impellers operating in the said casings.

4. A bag filling machine of the class described, including a hopper, upper and lower impeller casings located below the hopper, the upper impeller casing having a cylindrical chamber and provided at the top with an inlet opening and having an outlet opening at the bottom communicating with the lower impeller casing, said upper impeller casing being provided at the outer side of its outlet opening with an inclined surface lying beyond the cylindrical portion of the wall of the said chamber so as not to interfere with the rotation of an impeller the full diameter of the: cylindrical chamber and extending upwardly and inwardly for directing material downwardly through the said outlet opening, said inclined surface overhanging the said outlet opening and preventing accumulation of material thereon and tending to crowd the material through the opening an upper rotary impeller operating within the upper casing and having blades set at an angle and arranged to force the material downwardly through the outlet opening said upper impeller being of substantially the diameter of the cylindrical chamber of the upper impeller casing, and a lower rotary impeller operating within the lower casing.

5. A bag filling machine, including a hopper, upper and lower impeller casings located below the hopper, the upper impeller casing being provided at the top with an inlet opening and having an outlet opening at the bottom communicating with the lower impeller casing, an upper rotary impeller operating within the upper casing and provided with blades set at an angle and presenting inclined surfaces to the material for forcing the same downwardly through the outlet opening of the upper impeller casing, and a lower rotary impeller operating within the lower impeller casing.

6. A bag filling machine of the class described, including upper and lower impeller casings communicating with each other, upper and lower rotary impellers mounted in the said casings, the lower rotary impeller being provided with pockets closed at the bottom, said lower impeller casing being provided at opposite sides with openings located below the closed bottoms of the said pockets, an air-tight dust box located below the lower impeller casing and having openings communicating with the bottom openings thereof, a vertical bearing member extending through the dust box from the top to the bottom thereof, a tubular shaft extending through the bearing member and connected with the lower rotary impeller, a central shaft extending through the tubular shaft and connected with the upper impeller, upper and lower bearings carried by the bearing member and receiving the tubular shaft, and means for rotating the said shafts.

'7. A bag filling machine of the class described, including a hopper, upper and lower rotary impellers, and means for housing the upper and lower impellers including upper and lower impeller chambers, the upper impeller chamber being provided at the top at one side with an inlet opening and having at the bottom an outlet opening out of alignment with the inlet opening and the lower impeller chamber being provided with an inlet opening at the top at the outlet opening of the upper impeller chamber to form a passage from the upper impeller chamber to the lower impeller chamber, said means including a rotary disk member located between the upper and lower impeller chambers and adapted to be adjusted to vary the size of the passage between the chambers, and exteriorly arranged means for operating the rotary disk member.

8. A bag filling machine of the class described, including a hopper, upper and lower rotary impellers, and means for housing the upper and lower impellers including upper and lower impeller chambers, the upper impeller chamber being provided at the top at one side with an inlet opening and having at the bottom an outlet opening out of alignment with the inlet opening, and the lower impeller chamber being provided with an inlet opening at the top at the outlet opening of the upper impeller chamber, the outlet opening of the upper chamber and the inlet opening of the lower chamber constituting a passage from the upper chamber to the lower chamber, said means including exteriorly operable means for varying the size of the passage between the upper and lower chambers.

9. A bag filling machine of the class described, including a hopper, upper and lower rotary impellers, means for housing the upper and lower impellers including upper and lower impeller chambers, the upper impeller chamber being provided at the top at one side with an inlet opening and having at the bottom an outlet opening out of alignment with the inlet opening, and the lower impeller chamber being provided with an inlet opening at the top at the outlet opening of the upper impeller chamber, the outlet opening of the upper chamber and the inlet opening of the lower chamber constituting a passage from the upper chamber to the lower chamber, said means including a rotary disk member adapted to vary the size of the passage between the upper and lower chambers, an operating arm connected with the disk member, and means for holding the operating arm to secure the disk member in its adjustment.

10. A bag filling machine of the class described including a hopper, upper and lower impeller casings located below the hopper, the upper impeller casing having a cylindrical chamber and provided at the top with an inlet opening and having an outlet opening at the bottom communicating with the lower impeller casing, said upper impeller casing being provided at the outer side of the outlet opening with an inclined surface extending upwardly and inwardly for directing ma- 1 terial downwardly through said outlet opening, said inclined surface overhanging the outlet opening of the upper impeller casing and lying beyond the cylindrical wall of the said chamber and adapted to prevent material from accumulating on the said inclined surface and crowd the material through the outlet opening without obstructing the cylindrical chamber to permit the rotation of an impeller therein of the full diameter of the chamber, and upper and lower rotary impellers operating within said casing, the upper impeller being of substantially the diameter of the said cylindrical chamber.

WILLIAM D. WRIGHT. 

